Composite pavement



MURT'Y CUNNINGHAM, OF BELLEFONTE, PEXNSYLY; KIA.

CGMPOSITE PAVEMENT.

SPECIFICATION forming part. of Letters Patent No. 398,946, dated March 5, 1889.

Application filed September 8, 1888.

3 solid, so that the pavement when iinished \vil Serial No. 284,442. (No specimens) Q be uniform in thickness; but any foundation of Bellefonte, in the county of Centre and State of Pennsylvania, have invented a new and Improved Composite Pavement, of which the following is a full, clear, and exact description.

This invention relates to artificial pavements, and has for its object to provide a pavement which will be effective and durable.

described 5 in a composition for such pavements, consisting of broken stone or its equivalents, coke-screenings or screened coal-ashes, caltar, sulphur, a coloring material. and tallow, mixed for use, as hereinafter setforth.

will answer. i then put over the foundation a layer of thecomposition about one and a halt to two inches in thickness, and roll it so asto form a solid mass. As many layers are thus put down as will make Within about threeof the pavement.

quarters of an inch of the required thickness I then put on a layer of the same mixture, but with the stone or its equiv- The invention consists in a composite pavealentbrokcn to a sizeof from one and a quarment constructed and arranged as hereinafter ter to one and three-quarters of an 111Cll,\\'lllCli is then rolled solid and smooth. I then take a quantity of mixture X0. Zhcatcd until very thin, pour it over the surface, and scrub it with surface. sharp sand, so that the tar will not be seen.

The invention further consists in the application to the top layer of the pavement of a mixture of coal-tar, sulphur, a coloring material, and tallow While hot, all as hereinafter more specifically set forth and claimed.

My composition comprises, first, a body mixture consisting of four bushels coke-screenabroom, so as to fill all crevices and harden the The surface is then covered with The pavement is then ready for pedestrians, and the more sand trampcd in the smoother 1 the pavement.

This composition will adhere whether laid ings or screened coal-ashes and two bushels of ore-flint, gravel, broken stone, or broken iron cinders of a size of from one and onequired for it to harden; but the addition of fourth to one and three-fourths inch, well incorporated together, and of a binding mixture of six gallons ofcoal-tar, one pound sulphur, one-half pound fallow, and one-quarter pound Prussian blue. is to be heated so as to be thin enough to mix well with the first mixture. After the two mixtures have been thoroughly incorporated together the composition can be put aside in a i ond mixture when used-1n the compos1tion for In putting down my iniiproved pavement l first provide a suitable foundation of any suitable material as broken stone, gravel, cinders, c0al-ashes, &c.-\vhich is rolled even and This second mixture I walks.

The great objection heretofore to th class of pavement has been the length of time rethe sulphur entirely obviates this objection, as the sulphur causes the composition to harden quickly.

The tallow and Prussian blue make a lasting color which does not fade, the pavement retaining a bright blue color.

It will be understood that the tallow and Prussian blue might be omitted from the seethe lower layers in a pavement, as its purpose is mainly to give color to the pavement. It is also to be understood that the materials for the first mixture may be varied. according to r the location and ease of obtaining the same.

Coke-screenings are preferred as making the best paste,but ashes answer when the coke cani not be had; also, the iron ore flint, which can be obtained anywhere \vh ere iron ore is raised and can be obtained of the proper size, makes the best material for the purpose; but either of the other articlesnamed or any similar material will answer the purpose; and it will be further understood that although broken stone and screenings are specifically. claimed any l of broken stone, screenings, coal-tar, sulphur,

equivalent thereof may be used Without deikLHOW, and it coloring material; combined subparting from the spirit of my invention. stantizilly in the proportions set forth. Having thus described myinvention,whatl 3. A composition for pavements, consisting I5 5 claim as new, and desire to secure by Letters 3 of broken stone, coke-screenings, coal-tar, sul- Patent, is 1 phnr, talllow, and Prussian blue, substantially 1. In compositions for ptV6ll1Gl1lS,L bind as described. ing mixture consisting of coal-tar, sulphur, MURTY (I LTNNINGHAM. tallow, and a coloring material, combined sub- Witnesses: 1o stantially in the proportions set forth. W. K. LUDWIo,

2. A composition for pavements, consisting \V. J. HOWLEY. 

